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ZnO nanoparticles as pulse protecting agent against the bruchid beetle Callosobruchus maculatus (F).

Rakhi Kumari*, Seema Keshari & Purva Mandal
University Department of Zoology, Ranchi University, Ranchi Jharkhand, India
Received : 12th June, 2022 ; Revised : 13th July, 2022

Abstract– The treatment of Cicer arietinum with ZnO Nanoparticles (NPs) were conducted to know the efficacy of ZnO NPs as insecticide. The study revealed a significant enhancement in the mortality rate of the stored grain insect pest Callosobruchus maculatus and decreased weight loss percent of the gram seeds with the increasing concentration of the NPs. The result of this study clearly demonstrated the useful nature of ZnO NPs as seed protecting agent for the control of beetles and also enhance nutritional value of the gram seeds with zinc. Stored grains are lost each year due to beetle attack, so the treatment will increase the durability of stored gram and also the resistance developed by the pests due to chemical method of control would overcome by replacing the method by ZnO NPs treatment. Different concentrations of ZnO NPs were used and mortality rate and weight loss percent observed for each concentration. The highest concentration of 1000 ppm showed maximum mortality of 100% at fifth day after treatment. While the minimum concentration of 200 ppm showed 50% and control showed no mortality at the same interval. Similarly, Weight loss percent observed maximum in the control 12.25% followed by 200ppm treated seeds: 11.15% and minimum in 1000ppm: 5.25%.

Key words: ZnONPs, Bruchid beetles, Callosobruchus maculatus, Stored gram.

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